GB/T 42793-2024航空用铝合金板材通用技术规范国家标准
英文:General technical specification of aluminium alloy plates and sheets for aviation products GB/T 42793-2024介绍: 国家标准《航空...
英文:General technical specification of aluminium alloy plates and sheets for aviation products GB/T 42793-2024介绍: 国家标准《航空...